At least mark the URL to the Packages essay using \url.
diff --git a/Doc/ref/ref6.tex b/Doc/ref/ref6.tex
index 1c0e1eb..b810056 100644
--- a/Doc/ref/ref6.tex
+++ b/Doc/ref/ref6.tex
@@ -521,7 +521,7 @@
file \file{__init__.py}.\ttindex{__init__.py}
%
[XXX Can't be bothered to spell this out right now; see the URL
-http://www.python.org/doc/essays/packages.html for more details, also
+\url{http://www.python.org/doc/essays/packages.html} for more details, also
about how the module search works from inside a package.]
[XXX Also should mention __import__().]